use of org.apache.accumulo.core.data.thrift.ScanResult in project accumulo by apache.
the class ThriftScanner method scan.
private static List<KeyValue> scan(TabletLocation loc, ScanState scanState, ClientContext context) throws AccumuloSecurityException, NotServingTabletException, TException, NoSuchScanIDException, TooManyFilesException, TSampleNotPresentException {
if (scanState.finished)
return null;
OpTimer timer = null;
final TInfo tinfo = Tracer.traceInfo();
final HostAndPort parsedLocation = HostAndPort.fromString(loc.tablet_location);
TabletClientService.Client client = ThriftUtil.getTServerClient(parsedLocation, context);
String old = Thread.currentThread().getName();
try {
ScanResult sr;
if (scanState.prevLoc != null && !scanState.prevLoc.equals(loc))
scanState.scanID = null;
scanState.prevLoc = loc;
if (scanState.scanID == null) {
Thread.currentThread().setName("Starting scan tserver=" + loc.tablet_location + " tableId=" + loc.tablet_extent.getTableId());
if (log.isTraceEnabled()) {
String msg = "Starting scan tserver=" + loc.tablet_location + " tablet=" + loc.tablet_extent + " range=" + scanState.range + " ssil=" + scanState.serverSideIteratorList + " ssio=" + scanState.serverSideIteratorOptions + " context=" + scanState.classLoaderContext;
log.trace("tid={} {}", Thread.currentThread().getId(), msg);
timer = new OpTimer().start();
}
TabletType ttype = TabletType.type(loc.tablet_extent);
boolean waitForWrites = !serversWaitedForWrites.get(ttype).contains(loc.tablet_location);
InitialScan is = client.startScan(tinfo, scanState.context.rpcCreds(), loc.tablet_extent.toThrift(), scanState.range.toThrift(), Translator.translate(scanState.columns, Translators.CT), scanState.size, scanState.serverSideIteratorList, scanState.serverSideIteratorOptions, scanState.authorizations.getAuthorizationsBB(), waitForWrites, scanState.isolated, scanState.readaheadThreshold, SamplerConfigurationImpl.toThrift(scanState.samplerConfig), scanState.batchTimeOut, scanState.classLoaderContext);
if (waitForWrites)
serversWaitedForWrites.get(ttype).add(loc.tablet_location);
sr = is.result;
if (sr.more)
scanState.scanID = is.scanID;
else
client.closeScan(tinfo, is.scanID);
} else {
// log.debug("Calling continue scan : "+scanState.range+" loc = "+loc);
String msg = "Continuing scan tserver=" + loc.tablet_location + " scanid=" + scanState.scanID;
Thread.currentThread().setName(msg);
if (log.isTraceEnabled()) {
log.trace("tid={} {}", Thread.currentThread().getId(), msg);
timer = new OpTimer().start();
}
sr = client.continueScan(tinfo, scanState.scanID);
if (!sr.more) {
client.closeScan(tinfo, scanState.scanID);
scanState.scanID = null;
}
}
if (!sr.more) {
// log.debug("No more : tab end row = "+loc.tablet_extent.getEndRow()+" range = "+scanState.range);
if (loc.tablet_extent.getEndRow() == null) {
scanState.finished = true;
if (timer != null) {
timer.stop();
log.trace("tid={} Completely finished scan in {} #results={}", Thread.currentThread().getId(), String.format("%.3f secs", timer.scale(TimeUnit.SECONDS)), sr.results.size());
}
} else if (scanState.range.getEndKey() == null || !scanState.range.afterEndKey(new Key(loc.tablet_extent.getEndRow()).followingKey(PartialKey.ROW))) {
scanState.startRow = loc.tablet_extent.getEndRow();
scanState.skipStartRow = true;
if (timer != null) {
timer.stop();
log.trace("tid={} Finished scanning tablet in {} #results={}", Thread.currentThread().getId(), String.format("%.3f secs", timer.scale(TimeUnit.SECONDS)), sr.results.size());
}
} else {
scanState.finished = true;
if (timer != null) {
timer.stop();
log.trace("tid={} Completely finished in {} #results={}", Thread.currentThread().getId(), String.format("%.3f secs", timer.scale(TimeUnit.SECONDS)), sr.results.size());
}
}
} else {
if (timer != null) {
timer.stop();
log.trace("tid={} Finished scan in {} #results={} scanid={}", Thread.currentThread().getId(), String.format("%.3f secs", timer.scale(TimeUnit.SECONDS)), sr.results.size(), scanState.scanID);
}
}
Key.decompress(sr.results);
if (sr.results.size() > 0 && !scanState.finished)
scanState.range = new Range(new Key(sr.results.get(sr.results.size() - 1).key), false, scanState.range.getEndKey(), scanState.range.isEndKeyInclusive());
List<KeyValue> results = new ArrayList<>(sr.results.size());
for (TKeyValue tkv : sr.results) results.add(new KeyValue(new Key(tkv.key), tkv.value));
return results;
} catch (ThriftSecurityException e) {
throw new AccumuloSecurityException(e.user, e.code, e);
} finally {
ThriftUtil.returnClient(client);
Thread.currentThread().setName(old);
}
}
Aggregations